CVE-2026-123588 Hickory DNS Recursive Resolver Denial of Service via Cached Empty Connection Pool

The recursive resolver in Hickory DNS all versions of the hickory-recursor crate, and hickory-resolver 0.26.0 before 0.26.2 caches an empty connection pool when it follows a referral with no glue records and all queries for the name servers' IP addresses fail. An attacker able to spoof DNS...